The invention provides an aircraft wall surface heat reduction and resistance reduction method based on a pneumatic metasurface, a pneumatic metamaterial metasurface is arranged on the surface of an aircraft with heat reduction and resistance reduction, a metamaterial substrate of the pneumatic metamaterial metasurface is made of a porous medium material, and micro-nano pores allowing cooling gas in the aircraft to permeate outwards are densely distributed in the metamaterial substrate; microstructure surface units are arranged on the surface of the metamaterial substrate in a periodic array mode, and the microstructure surface units are provided with concave cavities. When an ultra-high-speed incoming flow passes through the meta-surface of the pneumatic meta-material, part of incoming flow gas resides in the concave cavity to form a standing vortex, so that the shearing action of the incoming flow and the surface of the meta-material substrate is reduced, and the resistance reduction effect is achieved; the cooling gas seeps from the surface of the metamaterial substrate from the inner side of the bottom surface of the metamaterial substrate through micro-nano pores in the metamaterial substrate, a layer of cooling gas film is formed on the surface of the metamaterial substrate, friction between a main flow and the surface of the metamaterial substrate is weakened, heat exchange between a high-enthalpy main flow and the surface of the metamaterial substrate is isolated, and the cooling effect is achieved.
本发明提供一种基于气动超表面飞行器壁面降热减阻方法,在降热减阻的飞行器表面设有气动超材料超表面,气动超材料超表面的超材料基底采用多孔介质材料,密布有能够供飞行器内部冷却气体外渗的微纳孔隙;超材料基底表面周期性阵列排布有微结构表面单元,微结构表面单元具有凹腔;超高速来流经过气动超材料超表面时,部分来流气体驻留在凹腔内形成驻涡,降低了来流与超材料基底表面的剪切作用,起到减阻作用;冷却气体从超材料基底底面内侧、经超材料基底内部的微纳孔隙从超材料基底表面渗出,在超材料基底表面形成一层冷却气膜,减弱主流与超材料基底表面的摩擦,并隔离了高焓主流与超材料基底表面的热交换,起到降热作用。
Aircraft wall surface heat reduction and resistance reduction method based on pneumatic metasurface
一种基于气动超表面飞行器壁面降热减阻方法
2024-10-25
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
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